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MC34712

Freescale Semiconductor
Part Number MC34712
Manufacturer Freescale Semiconductor
Description Fully Integrated DDR Switch-Mode Power Supply
Published Jul 4, 2007
Detailed Description Freescale Semiconductor Advance Information Document number: MC34712 Rev. 4.0, 5/2007 3.0 A 1.0 MHz Fully Integrated D...
Datasheet PDF File MC34712 PDF File

MC34712
MC34712

Overview
Freescale Semiconductor Advance Information Document number: MC34712 Rev.
4.
0, 5/2007 3.
0 A 1.
0 MHz Fully Integrated DDR Switch-Mode Power Supply The 34712 is a highly integrated, space efficient, low cost, single synchronous buck switching regulator with integrated N-channel power MOSFETs.
It is a high performance point-of-load (PoL) power supply with the ability to track an external reference voltage.
Its high efficient 3.
0 A sink and source capability combined with its voltage tracking/sequencing ability and tight output regulation, makes it ideal to provide the termination voltage (VTT) for modern data buses such as Double-Data-Rate (DDR) memory buses.
It also provides a buffered output reference voltage (VREF) to the memory chipset The 34712 offers the designer the flexibility of many control, supervisory, and protection functions to allow for easy implementation of complex designs.
It is housed in a Pb-Free, thermally enhanced, and space efficient 24-Pin Exposed Pad QFN.
Features • 45 mΩ Integrated N-Channel Power MOSFETs • Input Voltage Operating Range from 3.
0 V to 6.
0 V • ±1 % Accurate Output Voltage, Ranging from 0.
7 V to 1.
35 V • ±1 % Accurate Buffered Reference Output Voltage • Programmable Switching Frequency Range from 200 kHz to 1.
0 MHz with a default of 1.
0 MHz • Over Current Limit and Short Circuit Protection • Thermal Shutdown www.
DataSheet4U.
com • Output Overvoltage and Undervoltage Detection • Active Low Power Good Output Signal • Active Low Standby and Shutdown Inputs • Pb-Free Packaging Designated by Suffix Code EP.
VIN (3.
0V TO 6.
0V) 34712 SWITCH-MODE POWER SUPPLY EP SUFFIX 98ARL10577D 24-PIN QFN ORDERING INFORMATION Device MC34712EP/R2 Temperature Range (TA) -40 to 85°C Package 24 QFN 34712 PVIN VDDQ VREFIN SW VIN VDDI FREQ GND SD VOUT VDDQ MEMORY BUS BOOT VTT TERMINATING RESISTORS INV COMP VREFOUT PGND PG VIN DDR MEMORY CHIPSET VREF DDR MEMORY CONTROLER VDDQ MCU STBY Figure 1.
34712 Simplified Application Diagram * This document...


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